Should I use LTS Ubuntu?

Even if you want to play the latest Linux games, the LTS version is good enough — in fact, it is preferred. Ubuntu rolled out updates to the LTS version so that Steam would work better on it. The LTS version is far from stagnant — your software will work just fine on it.

What is an LTS release of Ubuntu Why is it important?

But, you will get the necessary bug fixes and security fixes in the updates of a Long Term Support version. An LTS release is recommended for production-ready consumers, businesses, and enterprises because you get years of software support and no system-breaking changes with software updates.